DC bias passing RF attenuators – SMA, 50 ohms, up to 3 GHz: BM10057 Series | Bracke Manufacturing

The Bracke Manufacturing BM10057 Series consists of coaxial RF attenuators featuring an SMA male-to-SMA female configuration. The components provide defined signal attenuation while allowing the DC bias voltage to pass through.

The series is available with attenuation values of 3 dB, 6 dB, 10 dB and 20 dB. All models feature a characteristic impedance of 50 ohms and are specified for frequencies up to 3 GHz.

Advantages

• DC bias passing capability for applications carrying an RF signal and DC voltage over the same coaxial connection
• Four available attenuation values: 3 dB, 6 dB, 10 dB and 20 dB
• SMA male-to-female configuration for direct integration into coaxial RF connections
• Defined 50-ohm impedance
• Maximum VSWR of 1.35:1
• RF input power rating up to 2 W

Key features

• Connectors: SMA male to SMA female
• Impedance: 50 ohms
• Frequency range: up to 3 GHz, depending on the model
• Attenuation: 3 dB, 6 dB, 10 dB or 20 dB
• Maximum VSWR: 1.35:1
• Maximum RF input power: 2 W
• Maximum voltage: 100 V
• Insulator: PTFE
• Contacts: gold-plated

Typical applications

• Defined attenuation of RF signals in 50-ohm systems
• RF connections requiring simultaneous transmission of a DC bias voltage
• Laboratory, test and measurement setups using SMA interfaces
• Signal-level adjustment within coaxial signal paths up to 3 GHz

Additional information

According to the provided drawings, the BM10057.3, BM10057.6 and BM10057.10 models use a passivated stainless-steel body. The BM10057.20 model is specified with a gold-plated brass body.

EMCO provides technical support for selecting suitable RF components and integrating them into coaxial measurement, test and system solutions.